Chinese Journal of Mechanical Engineering >

2021 , Vol. 34 >Issue 5: 102 - 102

DOI: https://doi.org/10.1186/s10033-021-00620-0

Original Article

Optimization Transmission Efficiency with Driver Intention for Automotive Continuously Variable Transmission under Slip Mode

  • Ling Han ,
  • Hui Zhang ,
  • Ruoyu Fang ,
  • Hongxiang Liu
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  • 1. School of Mechanical and Aerospace Engineering, Jilin University, Changchun, 130025, China;
    2. School of Mechatronic Engineering, Changchun University of Technology, Changchun, 130012, China

Received date: 2020-11-19

  Revised date: 2021-09-01

  Online published: 2022-03-22

Supported by

Supported by National Natural Science Foundation of China (Grant No. 51905044), Postdoctoral Science Foundation of China (Grant No. 2017M611316).

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Abstract

This study proposes and experimentally validates an optimal integrated system to control the automotive continuously variable transmission (CVT) by Model Predictive Control (MPC) to achieve its expected transmission efficiency range. The control system framework consists of top and bottom layers. In the top layer, a driving intention recognition system is designed on the basis of fuzzy control strategy to determine the relationship between the driver intention and CVT target ratio at the corresponding time. In the bottom layer, a new slip state dynamic equation is obtained considering slip characteristics and its related constraints, and a clamping force bench is established. Innovatively, a joint controller based on model predictive control (MPC) is designed taking internal combustion engine torque and slip between the metal belt and pulley as optimization dual targets. A cycle is attained by solving the optimization target to achieve optimum engine torque and the input slip in real-time. Moreover, the new controller provides good robustness. Finally, performance is tested by actual CVT vehicles. Results show that compared with traditional control, the proposed control improves vehicle transmission efficiency by approximately 9.12%-9.35% with high accuracy.

Key words： V-belt continuously variable transmission; Model predictive control; Drive intention; Slip mode; Transmission efficiency

Cite this article

Ling Han , Hui Zhang , Ruoyu Fang , Hongxiang Liu . Optimization Transmission Efficiency with Driver Intention for Automotive Continuously Variable Transmission under Slip Mode[J]. Chinese Journal of Mechanical Engineering, 2021 , 34(5) : 102 -102 . DOI: 10.1186/s10033-021-00620-0

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